func test():
	print(-9223372036854775808 == (1 << 63))
	print(-2)
	print(- 2)
	print(---2)
	print(3 - 2)
	print(3-2)
	print(3---2)
	print(-3 - 2)
	print(-3 - -2)
	print(-(3 - 2)-2)
	print([1, 2, 3][0]-1)
	var t = 1
	print(t-1)
	print(-0xFF)
	print(1--0xFF)
	print(floor(PI-1))